Control of flow separation around bluff obstacles by superimposed thermal buoyancy
作者: Dipankar ChatterjeeBittagopal Mondal
作者单位: 1Simulation & Modeling Laboratory, CSIR-Central Mechanical Engineering Research Institute, Durgapur 713209, India
刊名: International Journal of Heat and Mass Transfer, 2014, Vol.72 , pp.128-138
来源数据库: Elsevier Journal
DOI: 10.1016/j.ijheatmasstransfer.2014.01.013
关键词: Circular/square cylinderThermal buoyancyLow Reynolds numberRichardson numberFlow suppression
英文摘要: Abstract(#br)We analyze through numerical simulation the phenomena of suppression of flow separation around bluff obstacles by superimposed thermal buoyancy. For that purpose, we consider an unconfined flow of a Newtonian fluid around heated cylinders of circular and square cross-sections in a buoyancy-aided vertical flow configuration. The Reynolds numbers of the flow are kept intentionally low such that the flow remains steady and separated without imposition of the thermal buoyancy. When the buoyancy is added, it is observed that the flow separation diminishes gradually and at some critical value of the buoyancy parameter it completely disappears resulting a creeping flow like phenomena. Additionally, it is observed that the square cylinder requires more heating in comparison to its...
全文获取路径: Elsevier  (合作)